アナログ・コンパレータ(AC)ライブラリを作ってみた。
これで、Seeeduino XIAO のArduino-Core或いはlibrariesで非対応な周辺機能の対応はほぼ完了したのかな。
さて、あとは、どうしょうかな．．．
【概要】
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void begin(bool runstdby = false, bool lpmux = false) |
ライブラリを初期化する。
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void end(void) |
ライブラリを終了する。
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void config(ANACOMP_COMP comp, ANACOMP_MUXPOS pos, ANACOMP_MUXNEG neg, bool singleShot = false, bool hyst = false, bool swap = false, ANACOMP_SPEED speed = ANACOMP_SPEED_HIGH, ANACOMP_OUT out = ANACOMP_OUT_OFF, ANACOMP_FLEN flen = ANACOMP_FLEN_OFF) |
コンパレータを設定する。
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void scaler(ANACOMP_COMP comp, uint8_t value) |
VDDANA voltage scaler を設定する。
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void start(ANACOMP_COMP comp = ANACOMP_COMP0) |
コンパレータをスタートする。シングル・ショット・モード或いはウインドウ・モードを起動する場合は、コンパレータ(comp)の指定が必要。 それ以外はコンパレータ(comp)省略可能。
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void setCallback(ANACOMP_CALLBACK cb) |
割り込みコールバック関数を登録する。
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void interrupt(ANACOMP_COMP comp, ANACOMP_INTSEL sel, bool enable) |
コンパレータの割り込みを設定する。
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void winterrupt(ANACOMP_WINTSEL sel, bool enable) |
ウインドウ・モードの割り込みを設定する。
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EVENTSYS_USER eventInput(ANACOMP_COMP comp, bool enable) |
イベント入力を設定する。
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EVENTSYS_GEN eventOutput(ANACOMP_COMP comp, bool enable) |
イベント出力を設定する。
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bool state(ANACOMP_COMP comp) |
コンパレータの状態を返す。
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ANACOMP_WSTATE wstate(void) |
ウインドウ・モードの状態を返す。
【サンプル・スケッチ】
ウインドウ・モードを使ってA9ピンの電圧が1.0V – 2.0Vの範囲を外れたときに割り込みを起こすサンプル・スケッチ。
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#include "anacomp.h" void AnaComp_Callback(ANACOMP_COMP comp) { // Interrupt on signal outside window switch (AnaComp::wstate()) { case ANACOMP_WSTATE_ABOVE: // 2.0V <= A9 break; case ANACOMP_WSTATE_INSIDE: // 1.0V < A9 < 2.0V break; case ANACOMP_WSTATE_BELOW: // A9 <= 1.0V break; } } void setup() { AnaComp::begin(); AnaComp::config(ANACOMP_COMP0, ANACOMP_MUXPOS_PIN_A9, ANACOMP_MUXNEG_VSCALE); AnaComp::scaler(ANACOMP_COMP0, ANACOMP_SCALER_MAX * 2.0 / 3.3 - 1); AnaComp::config(ANACOMP_COMP1, ANACOMP_MUXPOS_PIN_A9, ANACOMP_MUXNEG_VSCALE); AnaComp::scaler(ANACOMP_COMP1, ANACOMP_SCALER_MAX * 1.0 / 3.3 - 1); AnaComp::setCallback(AnaComp_Callback); AnaComp::winterrupt(ANACOMP_WINTSEL_OUTSIDE, true); AnaComp::start(ANACOMP_WIN0); } void loop() { } |
【修正】
2020-06-11
XIAO用のポート定義をデジタルピン名からアナログピン名へ変更。
2020-05-24
eventsys.hのインクルード追加と、eventInput()及びeventOutput()を仕様変更し、EVENTSYS_USER型/EVENTSYS_GEN型を返すように修正。
【ライブラリ】
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/* anacomp.h - Analog Comparator Library for Microchip ATSAMD21 (Cortex®-M0+) Copyright (c) 2020 Sasapea's Lab. All right reserved. This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #ifndef __ANACOMP_H #define __ANACOMP_H #include <stdint.h> #include <stdbool.h> #include "gclock.h" #include "eventsys.h" #include "IOBUS.h" // // Port Define for Seeeduino XIAO // #ifdef SEEED_XIAO_M0 #define ANACOMP_MUXPOS_PIN_A1 ANACOMP_MUXPOS_PIN0 #define ANACOMP_MUXPOS_PIN_A8 ANACOMP_MUXPOS_PIN3 #define ANACOMP_MUXPOS_PIN_A9 ANACOMP_MUXPOS_PIN1 #define ANACOMP_MUXPOS_PIN_A10 ANACOMP_MUXPOS_PIN2 #define ANACOMP_MUXNEG_PIN_A1 ANACOMP_MUXNEG_PIN0 #define ANACOMP_MUXNEG_PIN_A8 ANACOMP_MUXNEG_PIN3 #define ANACOMP_MUXNEG_PIN_A9 ANACOMP_MUXNEG_PIN1 #define ANACOMP_MUXNEG_PIN_A10 ANACOMP_MUXNEG_PIN2 #endif #define ANACOMP_PIN_AIN0 IOBUS_PIN('A', 4) // AIN[0] #define ANACOMP_PIN_AIN1 IOBUS_PIN('A', 5) // AIN[1] #define ANACOMP_PIN_AIN2 IOBUS_PIN('A', 6) // AIN[2] #define ANACOMP_PIN_AIN3 IOBUS_PIN('A', 7) // AIN[3] #if 1 #define ANACOMP_PIN_OUT0 IOBUS_PIN('A', 18) // AC/CMP[0] // SAMD21J/G/E #define ANACOMP_PIN_OUT1 IOBUS_PIN('A', 19) // AC/CMP[1] // SAMD21J/G/E #else #define ANACOMP_PIN_OUT0 IOBUS_PIN('A', 12) // AC/CMP[0] // SAMD21J/G #define ANACOMP_PIN_OUT1 IOBUS_PIN('A', 13) // AC/CMP[1] // SAMD21J/G #endif typedef enum { ANACOMP_COMP0 = 0, ANACOMP_COMP1 = 1, ANACOMP_WIN0 = 2, } ANACOMP_COMP; typedef enum { ANACOMP_SPEED_LOW = AC_COMPCTRL_SPEED_LOW_Val, // Low speed ANACOMP_SPEED_HIGH = AC_COMPCTRL_SPEED_HIGH_Val, // High speed } ANACOMP_SPEED; typedef enum { ANACOMP_MUXNEG_PIN0 = AC_COMPCTRL_MUXNEG_PIN0_Val, // I/O pin 0 ANACOMP_MUXNEG_PIN1 = AC_COMPCTRL_MUXNEG_PIN1_Val, // I/O pin 1 ANACOMP_MUXNEG_PIN2 = AC_COMPCTRL_MUXNEG_PIN2_Val, // I/O pin 2 ANACOMP_MUXNEG_PIN3 = AC_COMPCTRL_MUXNEG_PIN3_Val, // I/O pin 3 ANACOMP_MUXNEG_GND = AC_COMPCTRL_MUXNEG_GND_Val, // Ground ANACOMP_MUXNEG_VSCALE = AC_COMPCTRL_MUXNEG_VSCALE_Val, // VDD scaler ANACOMP_MUXNEG_BANDGAP = AC_COMPCTRL_MUXNEG_BANDGAP_Val, // Internal bandgap voltage ANACOMP_MUXNEG_DAC = AC_COMPCTRL_MUXNEG_DAC_Val, // DAC output } ANACOMP_MUXNEG; typedef enum { ANACOMP_MUXPOS_PIN0 = AC_COMPCTRL_MUXPOS_PIN0_Val, // I/O pin 0 ANACOMP_MUXPOS_PIN1 = AC_COMPCTRL_MUXPOS_PIN1_Val, // I/O pin 1 ANACOMP_MUXPOS_PIN2 = AC_COMPCTRL_MUXPOS_PIN2_Val, // I/O pin 2 ANACOMP_MUXPOS_PIN3 = AC_COMPCTRL_MUXPOS_PIN3_Val, // I/O pin 3 } ANACOMP_MUXPOS; #define ANACOMP_SCALER_MAX 64 // scaler(0 - 63) typedef enum { ANACOMP_FLEN_OFF = AC_COMPCTRL_FLEN_OFF_Val, // No filtering ANACOMP_FLEN_MAJ3 = AC_COMPCTRL_FLEN_MAJ3_Val, // 3-bit majority function (2 of 3) ANACOMP_FLEN_MAJ5 = AC_COMPCTRL_FLEN_MAJ5_Val, // 5-bit majority function (3 of 5) } ANACOMP_FLEN; typedef enum { ANACOMP_OUT_OFF = AC_COMPCTRL_OUT_OFF_Val, // The output of COMPn is not routed to the COMPn I/O port ANACOMP_OUT_ASYNC = AC_COMPCTRL_OUT_ASYNC_Val, // The asynchronous output of COMPn is routed to the COMPn I/O port ANACOMP_OUT_SYNC = AC_COMPCTRL_OUT_SYNC_Val, // The synchronous output (including filtering) of COMPn is routed to the COMPn I/O port } ANACOMP_OUT; typedef enum { ANACOMP_INTSEL_TOGGLE = AC_COMPCTRL_INTSEL_TOGGLE_Val, // Interrupt on comparator output toggle ANACOMP_INTSEL_RISING = AC_COMPCTRL_INTSEL_RISING_Val, // Interrupt on comparator output rising ANACOMP_INTSEL_FALLING = AC_COMPCTRL_INTSEL_FALLING_Val, // Interrupt on comparator output falling ANACOMP_INTSEL_EOC = AC_COMPCTRL_INTSEL_EOC_Val, // Interrupt on end of comparison (single-shot mode only) } ANACOMP_INTSEL; typedef enum { ANACOMP_WINTSEL_ABOVE = AC_WINCTRL_WINTSEL0_ABOVE_Val, // Interrupt on signal above window ANACOMP_WINTSEL_INSIDE = AC_WINCTRL_WINTSEL0_INSIDE_Val, // Interrupt on signal inside window ANACOMP_WINTSEL_BELOW = AC_WINCTRL_WINTSEL0_BELOW_Val, // Interrupt on signal below window ANACOMP_WINTSEL_OUTSIDE = AC_WINCTRL_WINTSEL0_OUTSIDE_Val, // Interrupt on signal outside window } ANACOMP_WINTSEL; typedef enum { ANACOMP_WSTATE_ABOVE = AC_STATUSA_WSTATE0_ABOVE_Val, // Signal is above window ANACOMP_WSTATE_INSIDE = AC_STATUSA_WSTATE0_INSIDE_Val, // Signal is inside window ANACOMP_WSTATE_BELOW = AC_STATUSA_WSTATE0_BELOW_Val, // Signal is below window } ANACOMP_WSTATE; typedef void (*ANACOMP_CALLBACK)(ANACOMP_COMP); #if defined(__GNUC__) #pragma GCC diagnostic ignored "-Wswitch" #endif class AnaComp { private: static void sync(void) { while (AC->CTRLA.bit.SWRST || AC->STATUSB.bit.SYNCBUSY) continue; } static void controlGCLK(bool lpmux) { GClock::select (GCLOCK_ID_AC_ANA, GCLOCK_GEN_OSCULP32K); GClock::control(GCLOCK_ID_AC_ANA, !lpmux); // 32.768KHz GClock::control(GCLOCK_ID_AC_DIG, true); // 48MHz } static void stop(ANACOMP_COMP comp) { switch (comp) { case ANACOMP_COMP0: case ANACOMP_COMP1: if (AC->COMPCTRL[comp].bit.ENABLE) { multiplexing((ANACOMP_MUXPOS)AC->COMPCTRL[comp].bit.MUXNEG, false); multiplexing((ANACOMP_MUXPOS)AC->COMPCTRL[comp].bit.MUXPOS, false); if (AC->COMPCTRL[comp].bit.OUT != ANACOMP_OUT_OFF) multiplexing(comp, false); AC->COMPCTRL[comp].reg = AC_COMPCTRL_RESETVALUE; sync(); } break; } } static void multiplexing(ANACOMP_MUXPOS mux, bool enable) { switch (mux) { case ANACOMP_MUXPOS_PIN0: IOBUS::pinMode(ANACOMP_PIN_AIN0, DISABLE); break; case ANACOMP_MUXPOS_PIN1: IOBUS::pinMode(ANACOMP_PIN_AIN1, DISABLE); break; case ANACOMP_MUXPOS_PIN2: IOBUS::pinMode(ANACOMP_PIN_AIN2, DISABLE); break; case ANACOMP_MUXPOS_PIN3: IOBUS::pinMode(ANACOMP_PIN_AIN3, DISABLE); break; } if (enable) { switch (mux) { case ANACOMP_MUXPOS_PIN0: IOBUS::multiplexing(ANACOMP_PIN_AIN0, IOBUS_PMUX_B); break; case ANACOMP_MUXPOS_PIN1: IOBUS::multiplexing(ANACOMP_PIN_AIN1, IOBUS_PMUX_B); break; case ANACOMP_MUXPOS_PIN2: IOBUS::multiplexing(ANACOMP_PIN_AIN2, IOBUS_PMUX_B); break; case ANACOMP_MUXPOS_PIN3: IOBUS::multiplexing(ANACOMP_PIN_AIN3, IOBUS_PMUX_B); break; } } } static void multiplexing(ANACOMP_COMP comp, bool enable) { if (enable) { switch (comp) { case ANACOMP_COMP0: IOBUS::pinMode(ANACOMP_PIN_OUT0, OUTPUT); IOBUS::multiplexing(ANACOMP_PIN_OUT0, IOBUS_PMUX_H); break; case ANACOMP_COMP1: IOBUS::pinMode(ANACOMP_PIN_OUT1, OUTPUT); IOBUS::multiplexing(ANACOMP_PIN_OUT1, IOBUS_PMUX_H); break; } } #ifndef SEEED_XIAO_M0 else { switch (comp) { case ANACOMP_COMP0: IOBUS::pinMode(ANACOMP_PIN_OUT0, DISABLE); break; case ANACOMP_COMP1: IOBUS::pinMode(ANACOMP_PIN_OUT1, DISABLE); break; } } #endif } public: static void begin(bool runstdby = false, bool lpmux = false) { if (AC->CTRLA.bit.ENABLE) return; PM->APBCMASK.bit.AC_ = 1; controlGCLK(lpmux); AC->CTRLA.reg = AC_CTRLA_SWRST; sync(); AC->CTRLA.reg = (lpmux ? AC_CTRLA_LPMUX : 0) | (runstdby ? AC_CTRLA_RUNSTDBY(1) : 0); NVIC_EnableIRQ(AC_IRQn); NVIC_SetPriority(AC_IRQn, 0); } static void end(void) { if (PM->APBCMASK.bit.AC_) { NVIC_DisableIRQ(AC_IRQn); stop(ANACOMP_COMP0); stop(ANACOMP_COMP1); AC->CTRLA.reg = AC_CTRLA_SWRST; sync(); GClock::control(GCLOCK_ID_AC_DIG, false); GClock::control(GCLOCK_ID_AC_ANA, false); PM->APBCMASK.bit.AC_ = 0; } } static void config(ANACOMP_COMP comp, ANACOMP_MUXPOS pos, ANACOMP_MUXNEG neg, bool singleShot = false, bool hyst = false, bool swap = false, ANACOMP_SPEED speed = ANACOMP_SPEED_HIGH, ANACOMP_OUT out = ANACOMP_OUT_OFF, ANACOMP_FLEN flen = ANACOMP_FLEN_OFF) { switch (comp) { case ANACOMP_COMP0: case ANACOMP_COMP1: AC->COMPCTRL[comp].reg = AC_COMPCTRL_ENABLE | (singleShot ? AC_COMPCTRL_SINGLE : 0) | AC_COMPCTRL_SPEED(speed) | AC_COMPCTRL_MUXNEG(neg) | AC_COMPCTRL_MUXPOS(pos) | (swap ? AC_COMPCTRL_SWAP : 0) | AC_COMPCTRL_OUT(out) | (hyst ? AC_COMPCTRL_HYST : 0) | AC_COMPCTRL_FLEN(flen); sync(); multiplexing((ANACOMP_MUXPOS)pos, true); multiplexing((ANACOMP_MUXPOS)neg, true); if (out != ANACOMP_OUT_OFF) multiplexing(comp, true); break; } } static void scaler(ANACOMP_COMP comp, uint8_t value) { switch (comp) { case ANACOMP_COMP0: case ANACOMP_COMP1: AC->SCALER[comp].reg = AC_SCALER_VALUE(value); break; } } static void start(ANACOMP_COMP comp = ANACOMP_COMP0) { // enable AC if (!AC->CTRLA.bit.ENABLE) { AC->WINCTRL.bit.WEN0 = (comp == ANACOMP_WIN0); sync(); AC->CTRLA.bit.ENABLE = 1; sync(); } // start single-shot mode. continuous mode has no effect. switch (comp) { case ANACOMP_WIN0 : case ANACOMP_COMP0: AC->CTRLB.bit.START0 = 1; break; case ANACOMP_COMP1: AC->CTRLB.bit.START1 = 1; break; } } static void setCallback(ANACOMP_CALLBACK cb); static void interrupt(ANACOMP_COMP comp, ANACOMP_INTSEL sel, bool enable) { switch (comp) { case ANACOMP_COMP0: case ANACOMP_COMP1: AC->COMPCTRL[comp].bit.INTSEL = sel; if (enable) AC->INTENSET.reg = AC_INTENSET_COMP(1 << comp); else AC->INTENCLR.reg = AC_INTENCLR_COMP(1 << comp); break; } } static void winterrupt(ANACOMP_WINTSEL sel, bool enable) { AC->WINCTRL.bit.WINTSEL0 = sel; if (enable) AC->INTENSET.reg = AC_INTENSET_WIN0; else AC->INTENCLR.reg = AC_INTENCLR_WIN0; } static EVENTSYS_USER eventInput(ANACOMP_COMP comp, bool enable) { switch (comp) { case ANACOMP_COMP0: AC->EVCTRL.bit.COMPEI0 = enable; return EVENTSYS_USER_AC_SOC_0; case ANACOMP_COMP1: AC->EVCTRL.bit.COMPEI1 = enable; return EVENTSYS_USER_AC_SOC_1; } return EVENTSYS_USER_NONE; } static EVENTSYS_GEN eventOutput(ANACOMP_COMP comp, bool enable) { switch (comp) { case ANACOMP_COMP0: AC->EVCTRL.bit.COMPEO0 = enable; return EVENTSYS_GEN_AC_COMP_0; case ANACOMP_COMP1: AC->EVCTRL.bit.COMPEO1 = enable; return EVENTSYS_GEN_AC_COMP_1; case ANACOMP_WIN0 : AC->EVCTRL.bit.WINEO0 = enable; return EVENTSYS_GEN_AC_WIN_0; } return EVENTSYS_GEN_NONE; } static bool state(ANACOMP_COMP comp) { switch (comp) { case ANACOMP_COMP0: return AC->STATUSA.bit.STATE0 & AC->STATUSB.bit.READY0; case ANACOMP_COMP1: return AC->STATUSA.bit.STATE1 & AC->STATUSB.bit.READY1; } return false; } static ANACOMP_WSTATE wstate(void) { return (ANACOMP_WSTATE)AC->STATUSA.bit.WSTATE0; } }; #endif |
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/* anacomp.cpp - Analog Comparator Library for Microchip ATSAMD21 (Cortex®-M0+) Copyright (c) 2020 Sasapea's Lab. All right reserved. This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #include "anacomp.h" static ANACOMP_CALLBACK _callback; void AC_Handler(void) { if (AC->INTFLAG.bit.WIN0) { AC->INTFLAG.reg = AC_INTFLAG_WIN0; if (AC->INTENSET.bit.WIN0 && _callback) _callback(ANACOMP_WIN0); } if (AC->INTFLAG.bit.COMP1) { AC->INTFLAG.reg = AC_INTFLAG_COMP1; if (AC->INTENSET.bit.COMP1 && _callback) _callback(ANACOMP_COMP1); } if (AC->INTFLAG.bit.COMP0) { AC->INTFLAG.reg = AC_INTFLAG_COMP0; if (AC->INTENSET.bit.COMP0 && _callback) _callback(ANACOMP_COMP0); } } void AnaComp::setCallback(ANACOMP_CALLBACK cb) { _callback = cb; } |
【参照ライブラリ】
Seeeduino XIAO (ATSAMD21G18) のGPIO速度 (IOBUS.h)
Seeeduino XIAO (ATSAMD21G18) のGCLKライブラリ (gclock.h/gclock.cpp)
Seeeduino XIAO (ATSAMD21G18) のEVSYSライブラリ (eventsys.h/eventsys.cpp)